/kəˈlʌmnɪˌeɪt/ – Noun
Definition: kẻ vu khống, kẻ vu cáo.
A more throughout explanation: A calumniator is a person who makes false and malicious statements about someone with the intent to harm their reputation.
Example: The defendant was accused of being a calumniator for spreading false information about the plaintiff in an attempt to damage their reputation.